Should I bring a change of clothes or is that not necessary?

I’m going to one dinner party tonight in Roseville. The party is pretty nice and people are expected to dress up a bit, so I am. Later in the evening I have plans to go out with my friends. I kind of forgot about the plans with my friends and agreed to go to the dinner party and now the times overlap. I’ve sorted that problem and told my Roseville friends that I’ll have to leave early to be somewhere else I said I would be. Everyone is okay with this, but my problem is the time constraint. I don’t have time come back home and change clothes before I go meet my friends, but I’m pretty sure they’ll all be in jeans and sneakers. Is it okay if I show up to the not-as-formal dinner in my nicer outfit? Should I tell them I’ll be even later than my late arrival time so I can drive home and change?
Sorry if this seems like a stupid question. I’m not sure of the rules regarding attire.